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I have used this TC with both a Tamron 70-300 and the Canon EF 28-135 on the Canon 300D Digital Rebel.

Pictures taken from a stable tripod stopped down f/8 and low ISO are still somewhat blurred and have a noticable loss of contrast. In every instance where I have used this TC I later wished I did not when reviewing pictures

The last time I used it I setup a test where I used the 300mm with and without the TC and then compared uprezzing the non-TC shot to the same FofV as the TC shot and found that Photoshop does a much better job than this TC. Both sharpness and particularly contrast, suffer with the use of this TC.

The one pro for this TC is that it is cheap and built relatively solid. Additionally, it will give you the extra compression of the depth in a shot that a longer focal length provides. But that small benefit comes at a high cost.

My advice: don't use this TC. If you need a tighter shot just uprez in PS or buy a longer lens.

Ross_Alford

Registered: October 2005Posts: 36

Tamron 1.4X F AF review by Ross_Alford

Review Date: 1/1/2007

Would you recommend the product? Yes |
Total Spent: $79.00| Rating: 9

Pros:

Works well with most AF lenses, small, light, and high image quality

Cons:

does not work with AF-S lenses

I bought this mostly to use with a Sigma 70-300mm zoom I used to own. I also ended up using it with a Tamron 28-300 I used for a while with my D70, and with a Sigma 18-200 I still use. It worked admirably well with all three lenses, though I haven't experimented with it at the wider end of the wide-to-tele zooms. It does not degrade image quality appreciably, and gives a nice boost to the reach of telephoto lenses.

Combine the effect of this converter with the multiplier effect of an APS-C sized sensor as on Nikon DSLRs, and you can get amazing telephoto effects; for example a 300 becomes a 420, which is multiplied to a 630.

I don't use it much anymore because it doesn't allow AF with AF-S lenses. Still carry it occasionally when I take the D70 out with an 18-200 Sigma zoom; having this available increases the tele end of the zoom and makes the macro ability stunningly good.